Clay pulverizer and separator.



No. 7l2,05|. Patented Oct. 28, I902.

' J. ELLIOTT.

CLAY PULVERIZEB AND SEPARATUB. (Application flledflct. 11, 1901.)

'(No Model.)

K l u H s flaws-556% fnreill'ar;

IWM' UNITED STATES PATENT OFFICE.

JAMES ELLIOTT, OF W'INGHAM, CANADA.

CLAY PULVERlZER AND SEPARATOR.

SPECIFIQATTON formingpart Of Letters Patent-No. 712,051, dated October 28, 1902.

' Application filed October 11, 1901. Serial No. 78.375. (No model.)

To all, whom it may concern:

Be it known that I, JAMES ELLIOTT, a subject of the King of Great Britain, residing at Wingham, in the county of Huron and the Province of Ontario, Canada, have invented certain new and useful Improvements in Clay Pulverizers and Separators, of which the following is a specification.

My invention relates to improvements in machines for pulverizing clay and separating stones therefrom; and the objects of my improvements are, first, to more perfectly pulverize the clay fed to the machine, and, sec ondly, to more thoroughly separate the stones and other solid impurities of that nature from the clay. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a top view of the machine as it appears after the hopper is removed. Fig. 2 is a side view of the same. Fig. 3 is a vertical section on line 3 3 of Fig. 1, and Fig. 4is an end elevation. I

Similar letters of reference apply to similar parts throughout the several views.

In a suitable frame A, adapted to accommodate the various parts of the machinery,

are journaled two pairs of rollers BB and B B. The upper'pair of rollers 13 B have their tions are mounted equal spurwheels O, mesh- At one end the axles project be If not,the

gears on their axles are proportioned to give them the same speed as the top rollers. These bottom rollers B B have their surfaces broken by circular grooves, leaving circular ridges of rectangular cross-section pitched closer together, so that about two go to the space of one thread of the top rollers. They are journaled in bearings secured to the lower part of the sills of frame A.

On a shaft journaled in the double bearings is mounted a spur-pinion E, meshing in one of the spur-wheels O of the top rollers, and also a driving-shaft E. The direction of the motion is such that the top rollers B rotate toward each other from the top downward. The bottom rollers beinggeared to the top rollers rotate naturally toward each other and toward the top rollers from the bottom upward.

A hopper F surmounts the top rollers. A perforation conforming to and coinciding with the configuration of the converging surfaces of the top rollers is formed in that end of the hopper farthest from the gearing. Through this opening stones and other impurities are ejected.

Movable scrapers G are provided to clear the grooves of the top rollers, one for each roller. They consist each of a curved finger with chisel-pointed end adapted to enter the groove mounted on a collar G, adapted to turn and also to slide on a rod G which is held parallel to theroller in brackets secured to the side of'the sills. The scrapers G are provided with a guard projecting from the collar G, by which guard the scraper may be lifted by turning on the rod G into any part of the helical groove in roller B and will then follow the latter to the discharge end of the roller, where it will remain inactive until again brought into engagement. A stone or other matter that has become fast in the groove may thus be readily dislodged.

A triangular bar 0, disposed beneath the space between the upper rollers, serves to defiect the material outward onto the lower rollers, as will be readily understood from Fig. 3, the lower rollers moving so that their tops do not revolve toward each other, but in the opposite direction.

A plate-scraper H, Fig. 3, is applied to each top roller B near the bottom. This is held on a longitudinal lever or bar H, secured by a staple H and the plate H is pressed up against the outer surface of the upper roller B, scraping the clay off that roller into the grooves in the bottom roller B.

Scrapers I are also provided for the bottom rollers B. These scrapers are secured to the bottom of the frame of the machine and arranged so as to bear with their edges in the grooves of said rollers.

The efiect of the use of four rollers and their specially-prepared surfaces and relative setting is that the lower rollers throw back on the top rollers any stones that may escape the latter, and they may then be worked out at the opening in the end of the hopper or cleared from their grooves by the sliding scrapers, as already described; also, the top rollers force the clay into the bottom rollers, from which it is cleared by the bottom scrapers, also as described already. These top scrapers are only thrown into engagement with the rollers when occasion requires.

No claim is made in this application to anything claimed in my application, Serial No. 52,120, filed March 20, 1901.

Having thus described my invention, what I claim as new is In a clay pulverizer and separator, the combination with a receiving bin or hopper F having downwardly-converging sides and a bottom discharge, of a pair of spirallygrooved rollers B B, lower grooved rollers B B, driving and operating gears C D E, scrapers G G, scrapers H H disposed at right angles to the said scrapers G G, and the fixed vertically -disposed fingerscrapers I I, all substantially as shown and described and for the purpose specified.

JAMES ELLIOTT.

Witnesses:

J. R. MACDONALD, W. H. HELE. 

